Unlock instant, AI-driven research and patent intelligence for your innovation.

Ink powder for image forming and method and device for image forming

A technology of toner and image, which is applied in the field of toner for image formation, image formation and its device, which can solve the problem of insufficient blocking resistance, inability to simultaneously achieve low-temperature fixability, resistance to toner image heat transfer, background staining, etc. question

Inactive Publication Date: 2002-05-01
RICOH KK
View PDF23 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used alone, the fixing temperature range is narrower than when non-linear and linear resins are used in combination.
In order to solve this problem, Japanese Patent Laid-Open No. 8-320593 proposes blending three resins with different physical properties. However, due to the difference in the glass transition temperature range, dispersion of the toner is insufficient during kneading, and background smearing occurs. , and the caking resistance is not sufficient
In particular, in recent years, with the continuous development of low-temperature fixing, higher requirements have been put forward for low-temperature fixing, coupled with the miniaturization of the device, when using a low-load fixing device, it is impossible to achieve good low-temperature fixing performance and resistance to thermal transfer of ink images at the same time However, it cannot reach a level that ensures the fixing temperature range and satisfies image quality such as thermal preservation, crushing, and background smearing, and durability such as filming phenomenon.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ink powder for image forming and method and device for image forming
  • Ink powder for image forming and method and device for image forming
  • Ink powder for image forming and method and device for image forming

Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0224] Silicone resin (organic pure silicon) 100 parts

[0225] 100 parts of toluene

[0226] 5 parts of γ-(2-aminoethyl)aminopropyltrimethoxysilane

[0227] Carbon black 10 parts

[0228] The above mixture was dispersed with a high-speed mixer for 20 minutes to prepare a coating layer forming liquid. Magnetic carrier A was obtained by applying the above coating layer forming liquid to the surface of 1000 parts of spherical magnets having a particle diameter of 50 μm using a fluidized bed coating apparatus.

Embodiment 1

[0230] Non-linear polyester resin A60 parts

[0231] (acid value 16.3mgKOH / g, hydroxyl value 35.1mgKOH / g, softening point 145.1°C, glass transition point 61.5°C)

[0232] Linear polyester resin B40 parts

[0233] (acid value 2.1mgKOH / g, hydroxyl value 34mgKOH / g, softening point 100.8°C, glass transition point 60.3°C)

[0234] Carnauba wax (particle size 400μm) 4.5 parts

[0235] Carbon black (#44, manufactured by Mitsubishi Chemical) 8 parts

[0236] 3 parts of Zn(II) coordination compound of 3,5-di-tert-butylsalicylic acid

[0237] After the above mixture was fully stirred and mixed in a Henshel mixer, it was heated and melted at a temperature of 130°C in a roll mill for about 30 minutes. After cooling to room temperature, the kneaded product was obtained, which was coarsely pulverized into 200-400 μm in a hammer mill. Then, carry out pulverization and classification in the IDS-2 type pulverization and classification device (manufactured by Japan Pneumatic Industry Co., ...

Embodiment 2

[0247] Example 2, 3, 4

[0248] In Example 1, when the toner was pulverized, the supply amount of the pulverized material and the pulverization air pressure were changed to a toner having the particle size distribution described in Table 1. Others were the same as in Example 1, and the toner was produced and evaluated. .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an image forming toner which suppresses filming on an electrostatic charge image carrier and the method thereof, wherein when the toner is molded into a plate upon application of a pressure of 478 kg / cm<2>, the toner plate has a surface having a coefficient of static friction of from 0.20 to 0.40. The volume average particle diameter of the toner is 4 to 7.5 mu m and the toner contains 60 to 80% by number of particles of not more than 5 mu m and contains at least one selected from carnauba wax, montan wax and oxidized rice wax as the release agent and a nonlinear polymer resin A, a linear polymer resin B and a hybrid resin C as the bonding resins. All the resins A,B and C preferably contain at least the same polymer unit. Even when mechanical and thermal loads are put in an actual machine, is excellent in anti-hot offsetting property and can be used over a long period of time and to provide an image forming method and an image forming apparatus each using the toner.

Description

technical field [0001] The present invention relates to an image forming method for developing an electrostatic latent image in an electrophotography method, an electrostatic recording method, an electrostatic printing method, an image forming apparatus, an image forming toner used therein, and a manufacturing method thereof, and more particularly In other words, when there is a mechanical heat load in the device, it can suppress the formation of a film on the electrostatic charge image carrier, etc., and can be used for a long period of time to obtain image quality with good reproducibility of thin lines, and has sufficient low-temperature fixability and toner heat. Non-transfer property, good heat-resistant preservation, no background smearing, and can fully charge the toner to obtain high-quality images in a small and inexpensive developing device that does not have a toner replenishment mechanism. Background technique [0002] In the past, as the electrophotography metho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/083G03G9/087G03G9/097G03G9/10G03G15/08G03G15/20
CPCG03G9/08782G03G9/0808
Inventor 樋口博人佐佐木文浩岩本康敬中井洋志朱冰松田浩明近藤麻衣子
Owner RICOH KK